Thanks a bunch TIG, I forgot you could get the arcs edges! Still organizing all this information

I'm trying to make a half circle and then pushpull it into a half cylinder.

The way I went about it was making an arccurve and then putting a line at the base of this curve. However reading through the the api it seems like it isn't possible to make a face from a curve and an edge. Is this the case? If so, what would you recommend for making a half cylinder?

@unknownuser said:

Entities.add_faceSketchUp 6.0+

The add_face method is used to create a face. You can call this method a number of ways:

    entities.add_face(edge1, edge2, edge3, ...)
    entities.add_face(edgearray)
    entities.add_face(pt1, pt2, pt3, ...)
    entities.add_face([pt1, pt2, pt3,...])
    entities.add_face(curve)



For the last form that takes a Curve, the curve must be closed - like a circle.

Arguments:

some_entities
    Either a series of Edge or Point3d objects, an array of Point3d objects, or a closed Curve.

Returns:

face
    a Face object if successful

depth = 100
>      width = 100
>      model = Sketchup.active_model
>      entities = model.active_entities
>      pts = []
>      pts[0] = [0, 0, 0]
>      pts[1] = [width, 0, 0]
>      pts[2] = [width, depth, 0]
>      pts[3] = [0, depth, 0]
>      # Add the face to the entities in the model
>      face = entities.add_face pts
>      if (face)
>        UI.messagebox face
>      else
>        UI.messagebox "Failure"
>      end